Diversity of butterflies in the agricultural landscape: the role of farming system and landscape heterogeneity

Ecography ◽  
2000 ◽  
Vol 23 (6) ◽  
pp. 743-750 ◽  
Author(s):  
Ann-Christin Weibull ◽  
Jan Bengtsson ◽  
Eva Nohlgren
2012 ◽  
Vol 64 (4) ◽  
pp. 151-158 ◽  
Author(s):  
Joanna Czarnecka

The aim of the study was to evaluate the role of different types of linear structures in the preservation of four xerothermic species (<i>Centaurea scabiosa</i>, <i>Euphorbia cyparissias</i>, <i>Melampyrum arvense</i>, and <i>Salvia verticillata</i>) and two weeds (<i>Euphorbia exigua</i> and <i>Thymelaea passerina</i>). Observations were conducted in the agricultural landscape of Western Volhynia with fields of different land use intensity (a large-scale farming system and small traditional arable fields). The total length of the studied structures was 4760 m and the following five categories of structures were distinguished: field road verges adjacent to large (1) and small fields (2), field margins between the patches of xerothermic grasslands as well as large (3) or small fields (4) and balks (5). The distribution and abundance of species mentioned above were recorded there. The survey showed that linear habitats are not suitable for all the studied species; margins between arable fields and grasslands were the most important habitats for both grassland and weed species. Factors responsible for their abundance and distribution along these margins included the following: type of farming system, exposure of the margin, and soil moisture. Grassland species occupied habitats adjacent to small traditional fields with other than southern exposure; weeds were more abundant in drier microhabitas.


1996 ◽  
Vol 33 (4-5) ◽  
pp. 39-44
Author(s):  
J. Holas ◽  
M. Konvicková

Potential environmental impacts as a result of large-scale farming system in the Czech Republic have created a great deal of concern in recent years. This concern has led to several studies to identify the role of new regulations, directives and other legislative issues in the field of water pollution control. The set of legislative tools related to watershed management policy to promote better agricultural practices is shortly reviewed. The paper emphasises the running water law system amendment with respect to European community water quality regulations.


Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 807
Author(s):  
Simone Valeri ◽  
Laura Zavattero ◽  
Giulia Capotorti

In promoting biodiversity conservation and ecosystem service capacity, landscape connectivity is considered a critical feature to counteract the negative effects of fragmentation. Under a Green Infrastructure (GI) perspective, this is especially true in rural and peri-urban areas where a high degree of connectivity may be associated with the enhancement of agriculture multifunctionality and sustainability. With respect to GI planning and connectivity assessment, the role of dispersal traits of tree species is gaining increasing attention. However, little evidence is available on how to select plant species to be primarily favored, as well as on the role of landscape heterogeneity and habitat quality in driving the dispersal success. The present work is aimed at suggesting a methodological approach for addressing these knowledge gaps, at fine scales and for peri-urban agricultural landscapes, by means of a case study in the Metropolitan City of Rome. The study area was stratified into Environmental Units, each supporting a unique type of Potential Natural Vegetation (PNV), and a multi-step procedure was designed for setting priorities aimed at enhancing connectivity. First, GI components were defined based on the selection of the target species to be supported, on a fine scale land cover mapping and on the assessment of land cover type naturalness. Second, the study area was characterized by a Morphological Spatial Pattern Analysis (MSPA) and connectivity was assessed by Number of Components (NC) and functional connectivity metrics. Third, conservation and restoration measures have been prioritized and statistically validated. Notwithstanding the recognized limits, the approach proved to be functional in the considered context and at the adopted level of detail. Therefore, it could give useful methodological hints for the requalification of transitional urban–rural areas and for the achievement of related sustainable development goals in metropolitan regions.


2021 ◽  
Vol 212 ◽  
pp. 105063
Author(s):  
Waqar Ashiq ◽  
Hiteshkumar Vasava ◽  
Mumtaz Cheema ◽  
Kari Dunfield ◽  
Prasad Daggupati ◽  
...  

Author(s):  
Seyed Razi Bahavarnia ◽  
Pedram Ahli ◽  
Arash Rasouli

Background: Neospora caninum is a cyst forming coccidian parasites and one of the important factors in abortion of cows and neurologic disease in dogs around the world. This study was conducted to investigate the seroprevalence of N. caninum in dairy cows of Tabriz city using immunofluorescence method and related risk factors. Methods: In this study conducted in 2018, 100 samples from industrial cattle farms and 100 samples from traditional cattle farms of Tabriz were randomly collected. By fixing tachyzoites cultured in a culture medium, the kit was prepared in this study and the slides were examined by fluorescence microscopy (Zeiss). The results obtained in relation to the study variables (type of farming system, age, contact with dogs, and abortion history) were analyzed using SPSS software and chi-square test. Results: Neospora caninum antibodies were detected in 33 samples (16.5%). The relationship of positive serums with abortion and contact with dogs was significant statistically (P<0.05). Conclusions: Due to the significant relationship of infection rate in cows with abortion history and contact with dogs, further studies are needed to determine the exact role of Neospora in abortion of cows.


Author(s):  
Lluís Brotons ◽  
Sergi Herrando ◽  
Clélia Sirami ◽  
Vassiliki Kati ◽  
Mario Díaz

2020 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Eunice Gabriella ◽  
Sriroso Satmoko ◽  
Dyah Mardiningsih

The advanced farmer group that have many members, did not guarantee that the members of the group has intemacy value. Closed relation farmer members group would be shown by the strength of the farmer group role. The research aim was to identify the farmer groups role and the cohesiveness of organic vegetable farming system. The other research aim was to analyze the role of farmers groups influence on the cohesiveness of Tranggulasi organic vegetables farming system. The research was conducted at Tranggulasi farmer group, Desa Batur on 12-29 Mey 2018. Survey method was used and samples were conducted with 32 people of active members in farmer gtoup. The results showed that the farmer groups roles as learning class was in good category with percentage 53%, coorperation action was 63%, and unit of production was 69%. The cohesiveness of organic vegetable farming was good category with percentage 81%. Multiple linear regression test showed that the learning class, cooperation action, and unit of production, has significant effect on the cohesiveness of organic vegetable farming.


Limnologica ◽  
2018 ◽  
Vol 68 ◽  
pp. 5-16 ◽  
Author(s):  
Gunnar Lischeid ◽  
Thomas Kalettka ◽  
Matthias Holländer ◽  
Jörg Steidl ◽  
Christoph Merz ◽  
...  

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